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Every 3 days, William has to take medication for his back. Every 7 days, he has to take medication for his asthma. On what day will William take both medications?

User M Karimi
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2 Answers

4 votes
William would take both on the 22nd day!

I hope this helps!
User Qasimalbaqali
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4 votes
On the 21st day, 7x3=21
3x7=21
User Marek Lisik
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